Defence education film intended for children and young people, in which young heroes switch from the class to the training ground and their job is to fulfil a number of onerous tasks. Audiences are educated using the example of a young boy who repeatedly fails to overcome obstacles and who is taught by more adept pupils and the teacher.
| Actor | Role |
|---|---|
 Jiřina ŠvorcováCommentary (voice) (uncredited) | Commentary (voice) (uncredited) |
| MMiloš WilligCommentary (voice) (uncredited) | Commentary (voice) (uncredited) |